Water purification unit



FIG. 1 is a perspective view of a water purification unit showing ournew design;

FIG. 2 is a front elevational as well as both a top and bottom viewthereof, the rear elevational view being a substantial mirror imagethereof;

FIG. 3 is a left side elevational view; and,

FIG. 4 is a right side elevational view.

The ornamental design for a water purification unit, as shown anddescribed.